Double-acting grain-cleaning-machine screen.



No. 668,205. Patented Feb. I9, IQDI.

J. L. OWENS.

DUUBLE ACTING GRAIN CLEANING MACHINE SCREEN.

' (Appucatiun med Jan. 22, 1900.) (No ModeI.) 2 She'ets-Shaet I.

No. 668,205. Patented Feb. I9, I90I. J. L. OWENS.

DOUBLE ACTING GRAIN CLEANING MACHINE SCREEN.

(Appuneio med Jam 22. 1900.)

2 Sheets-Sheet 2.

(No Mdm.)

Miu,

Wmesse.

linitrnn *rates arent Ormea JOHN L. OVENS, OF MINNEAPOLIS, MINNESOTA.

DOUBLE-'ACTING GRAIN-CLEANsNe-MACHINE' SCREEN.

SLEGIFICATIOIT formingpart of Letters Patent No. 668,205, dated February 19, 1901.

Application filed January 22, 1900. Serial No. 2,281. (No model.)

b @ZZ whom, t may concern:

Beit known that I, JOHN L. OWENS, acitizen of the United States, residing at Minneapolis, in the county of Hennepin and State of Minnesota, have invented certain new and useful Improvements in Double-Acting Grain- Oleaning-Machine Screens, of which the following is a specification.

This invention relates to grain-cleaning machines; and it consists in the construction, combination, and arrangement of parts, as hereinafter shown and described, and specifically pointed out in the claims.

In the drawings, Figure lis a sectional side elevation ofthe machine complete. Fig. 2 is a detached sectional detail of a portion of the framework, illustrating its construction more fully and also illustrating a modification in some of the details of the construction. Fig. 3 is a plan view of one end of one ofthe frameplates detached. Figmi is an end elevation from the tail end of the machine. Figs. 5 and 6 are detached perspective details of portions of one end of the framework, illustrating the details of construction.

A is the framework, which is preferably oblong in shape and supporting a feed-hop-` per A2 at one end.

Suspended within the framework A is an inclined screen frame, and beneath this screen-frame and partially inclosing it is a shoe or secondary frame, supported from the main framework A and adapted to be vibrated, the secondary frame being somewhat longer than the screen-frame, so that as the secondary frame is vibratedsit strikes the ends of the screen-frame alternately and produces a vigorous jarring motion to the screen-frame. The screen-fra me consists of two side plates B' B2 and transverse end bars B3 B4, the screen material B5 being attached to the upper surfaces of the four pieces B B2 B3 B4, as shown. The side members B B2 are suspended at an incline by bars B6 from the frame A and project for some distance below the transverse end pieces by their lower sides, as shown, and with the ends of the side members cut away to form shoulders a c2. Along the upper surfaces of the side members B B2 are secured guard-strips B7 B0 to confine the material passing over the screen to the screen-surface,

and at the upper end the screen-frame is provided with upwardly-extended sides B0 B10, partially inclosing the lower or discharge end of the hopper A2. Supported between the extensions B0 B10 on a transverse rod d' is a feed-plate D', the feed-plate adapted to be adjusted on the central rod to regulate the flow of the material by increasing or decreasing the inclination of the feed-plate. The feedplate has a rearward upward extension D2 and partakes of the vibratory motion of the screen-f rame, and thereby insures the proper flow of the material over the feed-plate. Supported between the extensions B0 B10 is a shorter coarser screen E', inclined reversely to the screen B5 and adapted to discharge its tailings into a transversely-inclined spout E2, supported from the screen-frame and partaking of the motion of the screen, whereby the tailings 'from the screen are discharged at one side of the machine.

Beneath the screen-frame is supported a secondary frame, consisting of side bars F F2 and transverse end bars F3 F4, the end bars secured across the ends of the side bars by bolts e', fitting through slots e2 in the side bars near their ends to provide for the adjustment of the end bars. The end bars are connected by tie-rods F5 F0, 4so that all outward strains are borne against the nuts g on the ends of the rods. The end bars F3 F4 it beneath the end bars B0 B4 ofthe screenframe, with 'the shoulders a n.2 projecting behind the inner faces of the end bars F3 F4 of the secondary frame, so that as the secondary frame is vibrated the end bars F3 F4 strike against the shoulders a c2 and im part a knocking motion to the screen-frame. The secondary frame is supported upon spring-standards F7 and is adapted to be rapidly vilorated, as by eccentrics G on .a cross-shaft G2 and eccentric-straps G2, connecting the eccentrics to the said bars F F2. The secondary frame is provided with an imperforate bottom F0 and arranged to discharge the material falling on the imperforate bottom into an inclined transverse spout F0, attached to the secondary frame, so as to partake of its vibratory motion and provide for the discharge of the material passing through the screen off to one side of the machine. If preferred, the suspension-bars B0 may be replaced by rollers H, between the sides B B2 IOO of the screen-frame and the sides F F2 of the secondary frame, as shown in Fig. 2. By this simple arrangement of mechanism I am enabled to secure a very vigorous vibration and knocking motion to the screen-frame, which produces very greatly improved results in cleaning certain kinds of grain.

The coarse preliminary screen E enables me to separate out the coarser material yand prevent it from passing to and mingling with the material passing over the screen B5.

The arrangement for adjusting the transverse end bars ll3 F4 by the combined action of the rods F5 F6 and the bolts e and slots e2 is an important feature, as the lengths of the vibrations and the consequent'force of the knocking may be thereby adjusted to conform to the requirements of the quality of material being treated, some kinds of material requiring a much more vigorous treatment than others.

Having thus described my invention, what I claim as new is l. In a grain-separator, a screen-frame consisting of downwardly-projecting side members and transverse end members and covered on their upper surfaces with the screen material, a secondary frame consisting of side members and transverse end members, and supported to be vibrated, the end members of the secondary frame being connected adjustably to the side members of that frame and projecting outside the ends of said downwardlyprojecting side members of said screen-frame, whereby the space between the adjacent parts of the said end members of said secondary frame and the side members of said screenframe may be regulated, substantially as and for the purpose set forth.

2. In a grain-separator, a screen-frame consisting of downwardly-projecting side members and transverse end members said frame being covered on its upper surface with the screen material, a secondary frame consist- 

